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Use consistent wording for these two orientation systems: EQJ = J2000 mean equator ECL = J2000 mean ecliptic
20 lines
717 B
Markdown
20 lines
717 B
Markdown
//[astronomy](../../index.md)/[io.github.cosinekitty.astronomy](index.md)/[rotationEclEqd](rotation-ecl-eqd.md)
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# rotationEclEqd
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fun [rotationEclEqd](rotation-ecl-eqd.md)(time: [Time](-time/index.md)): [RotationMatrix](-rotation-matrix/index.md)
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Calculates a rotation matrix from J2000 mean ecliptic (ECL) to equatorial of-date (EQD).
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This is one of the family of functions that returns a rotation matrix for converting from one orientation to another. Source: ECL = ecliptic system, using equator at J2000 epoch. Target: EQD = equatorial system, using equator of date.
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#### Return
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A rotation matrix that converts ECL to EQD.
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## Parameters
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| time | The date and time of the desired equator. |
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